[TYPO3-dev] Add Dependencies for extensions

[Daniel Pötzinger]

Hello

I am trying to add a dependencies to my extension danp_documentdirs...

I tried four times adding the dependecies in ext_emconf
...
  'constraints' => array(
                 'depends' => array(
                         'danp_libs'=>''
                 ),
...

But after uploading and downloading the new version the dependencies is 
lost.

It is really demotivating, and after updating the site crashes because 
of the missing needed-extension.

What is wrong?